Anatomical Landmarks Flashcards

(47 cards)

1
Q

Words that describe how dental images will appear

A

radiolucent and radiopaque

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2
Q

Radiolucent

A

black, dark gray

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3
Q

Radiopaque

A

white, light gray

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4
Q

Facial landmarks

A

Tragus of ear and ala of nose

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5
Q

How should the patient be sat for intra oral images?

A

Mid-sagittal plane perpendicular to the floor

Occlusal plane must be parallel to the floor

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6
Q

How must the patient be sat for extra oral mages?

A

ala-tragus line parallel to floor

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7
Q

Radiologic appearance of enamel

A

radiopaque

most dense structure in human body

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8
Q

Radiologic appearance of dentin

A

internal portion of tooth radiopaque- less dense than enamel

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9
Q

Radiologic appearance of cementum

A

Unable to see– because it is less dense than dentin

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10
Q

Radiologic appearance of pulp

A

radiolucent- composed of nerves and blood vessels –> soft tissue

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11
Q

Radiologic appearance of alveolar bone

A

radiopaque- composed or cortical and cancellous bone

Where teeth erupt from and how they are maintained in the jaw

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12
Q

Radiologic appearance of cortical bone

A

Radiopaque (dense)
compact or dense form of bone which lines the outside layers of the maxillary arch or mandible. Immediately surrounds and supports teeth

Also referred to as cribiform plate or lamina dura– continuous with alveolar crest– Borders the cancellous bone

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13
Q

Radiologic appearance of cancellous bone

A

Appears less radiopaque than the lamina dura– it is less dense

“Spongy”

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14
Q

Radiologic appearance of periodontal ligament

A

radiolucent line– between tooth and lamina dura

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15
Q

Radiologic appearance of nutrient canals

A

radiolucent lines in bone containing blood vessels and sometimes exhibit radiopaque borders

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16
Q

Landmarks of the maxillary arch around central/lateral incisors

A
Incisive foramen/anterior palatine foramen
Median palatine suture
Nasal Fossae
Nasal septum
Inferior nasal conchae
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17
Q

Radiologic appearance of incisive foramen/anterior palatine foramen

A

Radiolucent, oval shape between the apices of the central incisors

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18
Q

Radiologic appearance of median palatine suture

A

Radiolucent, extends posteriorly through the midline of the palate

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19
Q

Radiologic appearance of nasal fossae

A

2 radiolucent areas upper portion of radiograph; air spaces

20
Q

Radiologic appearance of nasal septum

A

radiopaque between nasal fossae

21
Q

Radiologic appearance of inferior nasal conchae

A

wafer-like bone located in nasal fossa

22
Q

Landmarks of the maxillary arch near the cuspids

A

Nasal fossa
Maxillary sinus
Typical “Y” of maxillary sinus

23
Q

location of nasal fossa from cuspids

A

Upper left corner

24
Q

Radiologic appearance of maxillary sinus

A

Radiolucent- air space above bicuspids

25
Radiologic appearance of typical "Y" of maxillary sinus
Radiopaque- where the upper front wall of maxillary sinus joins with the floor of the nasal fossa
26
Maxillary Bicuspid landmarks
Maxillary sinus | Zygomatic or Malar bone
27
Radiologic appearance of zygomatic or malar bone
Rdiopaque- U shaped
28
Landmarks of the maxillary arch on molar radiographs
``` Maxillary sinus Zygomatic process Zygoma Maxillary tuberosity Medial plate of the pterygoid process or Hamular process Coronoid process ```
29
Radiologic appearance of zygomatic process
U shaped radiopacy in the apical region of the 1st and 2nd molars superimposed over the molar root tips
30
Radiologic appearance of the zygoma
Radiopaque- superimposed over maxillary molar sinus- extending posteriorly from the zygomatic bone
31
Radiologic appearance of maxillary tuberosity
Radiopaque
32
Radiologic appearance of Medial plate of pterygoid process or hamular process
Radiopaque- tendon attachment for muscle fibers
33
Radiologic appearance of coronoid process
Radiopaque- serves as a point of muscle attachment
34
Landmarks of the mandibular arch at central incisors
``` Lingual foramen Genial tubercles mental ridge/process Inferior border of the mandible Mental fossa ```
35
Radiologic appearance of Lingual foramen
radiolucent- between the apices of the central incisors
36
Radiologic appearance of genial tubercles
radiopaque- surrounds the lingual foramen
37
Radiologic appearance of mental ridge/process
Radiopaque, thickening of bone- located below the apices of the anterior teeth (labial)
38
Landmarks of the mandibular arch at the cuspids
Mental foramen | Inferior border of the mandible
39
Radiologic appearance of mental foramen
radiolucent- lies inferior to the apices of the bicuspids (labial)
40
Landmarks of the mandibular arch at the bicuspids
Mental foramen Mylohyoid ridge (internal oblique ridge) Inferior border of mandible
41
Radiologic appearance of mental foramen at the bicuspids
may be superimposed over the root apices of the bicuspids Between them
42
Radiologic appearance of mylohyoid ridge
Radiopaque- below the apices of the molars
43
Landmarks of the mandibular arch at the molars
``` Submandibular fossa External oblique ridge Internal oblique ridge Mandibular canal Inferior border of mandible ```
44
Radiologic appearance of submandibular fossa
large, irregularly shaped area below roots of mandibular molar in which the bone thickening is reduced, often mistaken for a tissue
45
Radiologic appearance of external oblique ridge
Radiopaque- terminates in the region of the 3rd molar/ outer surface of the mandible
46
Radiologic appearance of internal oblique ridge
Radiopaque- inferior to the EOR also refered to as the mylohyoid ridge Extends more anterior than the EOR- internal surface of mandible
47
Radiologic appearance of mandibular canal
Radiolucent- carries nerves and blood vessels; travels to area of mental foramen